- 17 Feb, 2016 11 commits
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Uri Mashiach authored
commit 9b2761cb upstream. The maximum chunks used by the function is (SPI_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE + 1). The original commands array had space for (SPI_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE) commands. When the last chunk is used (len > 4 * WSPI_MAX_CHUNK_SIZE), the last command is stored outside the bounds of the commands array. Oops 5 (page fault) is generated during current wl1271 firmware load attempt: root@debian-armhf:~# ifconfig wlan0 up [ 294.312399] Unable to handle kernel paging request at virtual address 00203fc4 [ 294.320173] pgd = de528000 [ 294.323028] [00203fc4] *pgd=00000000 [ 294.326916] Internal error: Oops: 5 [#1] SMP ARM [ 294.331789] Modules linked in: bnep rfcomm bluetooth ipv6 arc4 wl12xx wlcore mac80211 musb_dsps cfg80211 musb_hdrc usbcore usb_common wlcore_spi omap_rng rng_core musb_am335x omap_wdt cpufreq_dt thermal_sys hwmon [ 294.351838] CPU: 0 PID: 1827 Comm: ifconfig Not tainted 4.2.0-00002-g3e9ad27-dirty #78 [ 294.360154] Hardware name: Generic AM33XX (Flattened Device Tree) [ 294.366557] task: dc9d6d40 ti: de550000 task.ti: de550000 [ 294.372236] PC is at __spi_validate+0xa8/0x2ac [ 294.376902] LR is at __spi_sync+0x78/0x210 [ 294.381200] pc : [<c049c760>] lr : [<c049ebe0>] psr: 60000013 [ 294.381200] sp : de551998 ip : de5519d8 fp : 00200000 [ 294.393242] r10: de551c8c r9 : de5519d8 r8 : de3a9000 [ 294.398730] r7 : de3a9258 r6 : de3a9400 r5 : de551a48 r4 : 00203fbc [ 294.405577] r3 : 00000000 r2 : 00000000 r1 : 00000000 r0 : de3a9000 [ 294.412420] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 294.419918] Control: 10c5387d Table: 9e528019 DAC: 00000015 [ 294.425954] Process ifconfig (pid: 1827, stack limit = 0xde550218) [ 294.432437] Stack: (0xde551998 to 0xde552000) ... [ 294.883613] [<c049c760>] (__spi_validate) from [<c049ebe0>] (__spi_sync+0x78/0x210) [ 294.891670] [<c049ebe0>] (__spi_sync) from [<bf036598>] (wl12xx_spi_raw_write+0xfc/0x148 [wlcore_spi]) [ 294.901661] [<bf036598>] (wl12xx_spi_raw_write [wlcore_spi]) from [<bf21c694>] (wlcore_boot_upload_firmware+0x1ec/0x458 [wlcore]) [ 294.914038] [<bf21c694>] (wlcore_boot_upload_firmware [wlcore]) from [<bf24532c>] (wl12xx_boot+0xc10/0xfac [wl12xx]) [ 294.925161] [<bf24532c>] (wl12xx_boot [wl12xx]) from [<bf20d5cc>] (wl1271_op_add_interface+0x5b0/0x910 [wlcore]) [ 294.936364] [<bf20d5cc>] (wl1271_op_add_interface [wlcore]) from [<bf15c4ac>] (ieee80211_do_open+0x44c/0xf7c [mac80211]) [ 294.947963] [<bf15c4ac>] (ieee80211_do_open [mac80211]) from [<c0537978>] (__dev_open+0xa8/0x110) [ 294.957307] [<c0537978>] (__dev_open) from [<c0537bf8>] (__dev_change_flags+0x88/0x148) [ 294.965713] [<c0537bf8>] (__dev_change_flags) from [<c0537cd0>] (dev_change_flags+0x18/0x48) [ 294.974576] [<c0537cd0>] (dev_change_flags) from [<c05a55a0>] (devinet_ioctl+0x6b4/0x7d0) [ 294.983191] [<c05a55a0>] (devinet_ioctl) from [<c0517040>] (sock_ioctl+0x1e4/0x2bc) [ 294.991244] [<c0517040>] (sock_ioctl) from [<c017d378>] (do_vfs_ioctl+0x420/0x6b0) [ 294.999208] [<c017d378>] (do_vfs_ioctl) from [<c017d674>] (SyS_ioctl+0x6c/0x7c) [ 295.006880] [<c017d674>] (SyS_ioctl) from [<c000f4c0>] (ret_fast_syscall+0x0/0x54) [ 295.014835] Code: e1550004 e2444034 0a00007d e5953018 (e5942008) [ 295.021544] ---[ end trace 66ed188198f4e24e ]--- Signed-off-by:
Uri Mashiach <uri.mashiach@compulab.co.il> Acked-by:
Igor Grinberg <grinberg@compulab.co.il> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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xuejiufei authored
commit c95a5180 upstream. When recovery master down, dlm_do_local_recovery_cleanup() only remove the $RECOVERY lock owned by dead node, but do not clear the refmap bit. Which will make umount thread falling in dead loop migrating $RECOVERY to the dead node. Signed-off-by:
xuejiufei <xuejiufei@huawei.com> Reviewed-by:
Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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xuejiufei authored
commit bef5502d upstream. We have found that migration source will trigger a BUG that the refcount of mle is already zero before put when the target is down during migration. The situation is as follows: dlm_migrate_lockres dlm_add_migration_mle dlm_mark_lockres_migrating dlm_get_mle_inuse <<<<<< Now the refcount of the mle is 2. dlm_send_one_lockres and wait for the target to become the new master. <<<<<< o2hb detect the target down and clean the migration mle. Now the refcount is 1. dlm_migrate_lockres woken, and put the mle twice when found the target goes down which trigger the BUG with the following message: "ERROR: bad mle: ". Signed-off-by:
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Takashi Iwai authored
commit e7fdd527 upstream. Many codecs, typically found on Realtek codecs, have the analog loopback path merged to the secondary input of the middle of the output paths. Currently, we don't offer the dynamic switching in such configuration but let each loopback path mute by itself. This should work well in theory, but in reality, we often see that such a dead loopback path causes some background noises even if all the elements get muted. Such a problem has been fixed by adding the quirk accordingly to disable aamix, and it's the right fix, per se. The only problem is that it's not so trivial to achieve it; user needs to pass a hint string via patch module option or sysfs. This patch gives a bit improvement on the situation: it adds "Loopback Mixing" control element for such codecs like other codecs (e.g. IDT or VIA codecs) with the individual loopback paths. User can turn on/off the loopback path simply via a mixer app. For keeping the compatibility, the loopback is still enabled on these codecs. But user can try to turn it off if experiencing a suspicious background or click noise on the fly, then build a static fixup later once after the problem is addressed. Other than the addition of the loopback enable/disablement control, there should be no changes. Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Ming Lei authored
commit d0e5fbb0 upstream. After commit e36f6204(block: split bios to maxpossible length), bio can be splitted in the middle of a vector entry, then it is easy to split out one bio which size isn't aligned with block size, especially when the block size is bigger than 512. This patch fixes the issue by making the max io size aligned to logical block size. Fixes: e36f6204(block: split bios to maxpossible length) Reported-by:
Stefan Haberland <sth@linux.vnet.ibm.com> Cc: Keith Busch <keith.busch@intel.com> Suggested-by:
Ming Lei <tom.leiming@gmail.com> Signed-off-by:
Jens Axboe <axboe@fb.com> Signed-off-by:
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Martin Wilck authored
commit 25cad69f upstream. Since b8b2c7d8, platform_drv_probe() is called for all platform devices. If drv->probe is NULL, and dev_pm_domain_attach() fails, platform_drv_probe() will return the error code from dev_pm_domain_attach(). This causes real_probe() to enter the "probe_failed" path and set dev->driver to NULL. Before b8b2c7d8, real_probe() would assume success if both dev->bus->probe and drv->probe were missing. As a result, a device and driver could be "bound" together just by matching their names; this doesn't work any more after b8b2c7d8. This may cause problems later for certain usage of platform_driver_register() and platform_device_register_simple(). I observed a panic while loading the tpm_tis driver with parameter "force=1" (i.e. registering tpm_tis as a platform driver), because tpm_tis_init's assumption that the device returned by platform_device_register_simple() was bound didn't hold any more (tpmm_chip_alloc() dereferences chip->pdev->driver, causing panic). This patch restores the previous (4.3.0 and earlier) behavior of platform_drv_probe() in the case when the associated platform driver has no "probe" function. Fixes: b8b2c7d8 ("base/platform: assert that dev_pm_domain callbacks are called unconditionally") Signed-off-by:
Martin Wilck <Martin.Wilck@ts.fujitsu.com> Cc: Martin Fuzzey <mfuzzey@parkeon.com> Acked-by:
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by:
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Ioan-Adrian Ratiu authored
commit e470127e upstream. The critical section protected by usbhid->lock in hid_ctrl() is too big and because of this it causes a recursive deadlock. "Too big" means the case statement and the call to hid_input_report() do not need to be protected by the spinlock (no URB operations are done inside them). The deadlock happens because in certain rare cases drivers try to grab the lock while handling the ctrl irq which grabs the lock before them as described above. For example newer wacom tablets like 056a:033c try to reschedule proximity reads from wacom_intuos_schedule_prox_event() calling hid_hw_request() -> usbhid_request() -> usbhid_submit_report() which tries to grab the usbhid lock already held by hid_ctrl(). There are two ways to get out of this deadlock: 1. Make the drivers work "around" the ctrl critical region, in the wacom case for ex. by delaying the scheduling of the proximity read request itself to a workqueue. 2. Shrink the critical region so the usbhid lock protects only the instructions which modify usbhid state, calling hid_input_report() with the spinlock unlocked, allowing the device driver to grab the lock first, finish and then grab the lock afterwards in hid_ctrl(). This patch implements the 2nd solution. Signed-off-by:
Ioan-Adrian Ratiu <adi@adirat.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
Jason Gerecke <jason.gerecke@wacom.com> Signed-off-by:
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Tariq Saeed authored
commit b1b1e15e upstream. NFS on a 2 node ocfs2 cluster each node exporting dir. The lock causing the hang is the global bit map inode lock. Node 1 is master, has the lock granted in PR mode; Node 2 is in the converting list (PR -> EX). There are no holders of the lock on the master node so it should downconvert to NL and grant EX to node 2 but that does not happen. BLOCKED + QUEUED in lock res are set and it is on osb blocked list. Threads are waiting in __ocfs2_cluster_lock on BLOCKED. One thread wants EX, rest want PR. So it is as though the downconvert thread needs to be kicked to complete the conv. The hang is caused by an EX req coming into __ocfs2_cluster_lock on the heels of a PR req after it sets BUSY (drops l_lock, releasing EX thread), forcing the incoming EX to wait on BUSY without doing anything. PR has called ocfs2_dlm_lock, which sets the node 1 lock from NL -> PR, queues ast. At this time, upconvert (PR ->EX) arrives from node 2, finds conflict with node 1 lock in PR, so the lock res is put on dlm thread's dirty listt. After ret from ocf2_dlm_lock, PR thread now waits behind EX on BUSY till awoken by ast. Now it is dlm_thread that serially runs dlm_shuffle_lists, ast, bast, in that order. dlm_shuffle_lists ques a bast on behalf of node 2 (which will be run by dlm_thread right after the ast). ast does its part, sets UPCONVERT_FINISHING, clears BUSY and wakes its waiters. Next, dlm_thread runs bast. It sets BLOCKED and kicks dc thread. dc thread runs ocfs2_unblock_lock, but since UPCONVERT_FINISHING set, skips doing anything and reques. Inside of __ocfs2_cluster_lock, since EX has been waiting on BUSY ahead of PR, it wakes up first, finds BLOCKED set and skips doing anything but clearing UPCONVERT_FINISHING (which was actually "meant" for the PR thread), and this time waits on BLOCKED. Next, the PR thread comes out of wait but since UPCONVERT_FINISHING is not set, it skips updating the l_ro_holders and goes straight to wait on BLOCKED. So there, we have a hang! Threads in __ocfs2_cluster_lock wait on BLOCKED, lock res in osb blocked list. Only when dc thread is awoken, it will run ocfs2_unblock_lock and things will unhang. One way to fix this is to wake the dc thread on the flag after clearing UPCONVERT_FINISHING Orabug: 20933419 Signed-off-by:
Tariq Saeed <tariq.x.saeed@oracle.com> Signed-off-by:
Santosh Shilimkar <santosh.shilimkar@oracle.com> Reviewed-by:
Wengang Wang <wen.gang.wang@oracle.com> Reviewed-by:
Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by:
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Keith Busch authored
commit e36f6204 upstream. This splits bio in the middle of a vector to form the largest possible bio at the h/w's desired alignment, and guarantees the bio being split will have some data. The criteria for splitting is changed from the max sectors to the h/w's optimal sector alignment if it is provided. For h/w that advertise their block storage's underlying chunk size, it's a big performance win to not submit commands that cross them. If sector alignment is not provided, this patch uses the max sectors as before. This addresses the performance issue commit d3805611 attempted to fix, but was reverted due to splitting logic error. Signed-off-by:
Keith Busch <keith.busch@intel.com> Cc: Jens Axboe <axboe@fb.com> Cc: Ming Lei <tom.leiming@gmail.com> Cc: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by:
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Trond Myklebust authored
commit 1a093ceb upstream. Since commit 2d8ae84f, nothing is bumping lo->plh_block_lgets in the layoutreturn path, so it should not be touched in nfs4_layoutreturn_release either. Fixes: 2d8ae84f ("NFSv4.1/pnfs: Remove redundant lo->plh_block_lgets...") Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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LABBE Corentin authored
commit 4f9ea866 upstream. sun4i-ss implementaton of md5/sha1 is via ahash algorithms. Commit 8996eafd ("crypto: ahash - ensure statesize is non-zero") made impossible to load them without giving statesize. This patch specifiy statesize for sha1 and md5. Fixes: 6298e948 ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator") Tested-by:
Chen-Yu Tsai <wens@csie.org> Signed-off-by:
LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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- 31 Jan, 2016 29 commits
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Greg Kroah-Hartman authored
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Lorenzo Pieralisi authored
commit f436b2ac upstream. The Performance Monitors extension is an optional feature of the AArch64 architecture, therefore, in order to access Performance Monitors registers safely, the kernel should detect the architected PMU unit presence through the ID_AA64DFR0_EL1 register PMUVer field before accessing them. This patch implements a guard by reading the ID_AA64DFR0_EL1 register PMUVer field to detect the architected PMU presence and prevent accessing PMU system registers if the Performance Monitors extension is not implemented in the core. Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Fixes: 60792ad3 ("arm64: kernel: enforce pmuserenr_el0 initialization and restore") Signed-off-by:
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reported-by:
Guenter Roeck <linux@roeck-us.net> Tested-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
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Lorenzo Pieralisi authored
commit 60792ad3 upstream. The pmuserenr_el0 register value is architecturally UNKNOWN on reset. Current kernel code resets that register value iff the core pmu device is correctly probed in the kernel. On platforms with missing DT pmu nodes (or disabled perf events in the kernel), the pmu is not probed, therefore the pmuserenr_el0 register is not reset in the kernel, which means that its value retains the reset value that is architecturally UNKNOWN (system may run with eg pmuserenr_el0 == 0x1, which means that PMU counters access is available at EL0, which must be disallowed). This patch adds code that resets pmuserenr_el0 on cold boot and restores it on core resume from shutdown, so that the pmuserenr_el0 setup is always enforced in the kernel. Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by:
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Will Deacon authored
commit 32d63978 upstream. In paging_init, we allocate the zero page, memset it to zero and then point TTBR0 to it in order to avoid speculative fetches through the identity mapping. In order to guarantee that the freshly zeroed page is indeed visible to the page table walker, we need to execute a dsb instruction prior to writing the TTBR. Signed-off-by:
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John Blackwood authored
commit 5db4fd8c upstream. Make sure to clear out any ptrace singlestep state when a ptrace(2) PTRACE_DETACH call is made on arm64 systems. Otherwise, the previously ptraced task will die off with a SIGTRAP signal if the debugger just previously singlestepped the ptraced task. Signed-off-by:
John Blackwood <john.blackwood@ccur.com> [will: added comment to justify why this is in the arch code] Signed-off-by:
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Ulrich Weigand authored
commit a61674bd upstream. GCC 6 will include changes to generated code with -mcmodel=large, which is used to build kernel modules on powerpc64le. This was necessary because the large model is supposed to allow arbitrary sizes and locations of the code and data sections, but the ELFv2 global entry point prolog still made the unconditional assumption that the TOC associated with any particular function can be found within 2 GB of the function entry point: func: addis r2,r12,(.TOC.-func)@ha addi r2,r2,(.TOC.-func)@l .localentry func, .-func To remove this assumption, GCC will now generate instead this global entry point prolog sequence when using -mcmodel=large: .quad .TOC.-func func: .reloc ., R_PPC64_ENTRY ld r2, -8(r12) add r2, r2, r12 .localentry func, .-func The new .reloc triggers an optimization in the linker that will replace this new prolog with the original code (see above) if the linker determines that the distance between .TOC. and func is in range after all. Since this new relocation is now present in module object files, the kernel module loader is required to handle them too. This patch adds support for the new relocation and implements the same optimization done by the GNU linker. Signed-off-by:
Ulrich Weigand <ulrich.weigand@de.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Ulrich Weigand authored
commit 2e50c4be upstream. If a text section starts out with a data blob before the first function start label, disassembly parsing doing in recordmcount.pl gets confused on powerpc, leading to creation of corrupted module objects. This was not a problem so far since the compiler would never create such text sections. However, this has changed with a recent change in GCC 6 to support distances of > 2GB between a function and its assoicated TOC in the ELFv2 ABI, exposing this problem. There is already code in recordmcount.pl to handle such data blobs on the sparc64 platform. This patch uses the same method to handle those on powerpc as well. Acked-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Boqun Feng authored
commit 81d7a329 upstream. According to memory-barriers.txt, xchg*, cmpxchg* and their atomic_ versions all need to be fully ordered, however they are now just RELEASE+ACQUIRE, which are not fully ordered. So also replace PPC_RELEASE_BARRIER and PPC_ACQUIRE_BARRIER with PPC_ATOMIC_ENTRY_BARRIER and PPC_ATOMIC_EXIT_BARRIER in __{cmp,}xchg_{u32,u64} respectively to guarantee fully ordered semantics of atomic{,64}_{cmp,}xchg() and {cmp,}xchg(), as a complement of commit b97021f8 ("powerpc: Fix atomic_xxx_return barrier semantics") This patch depends on patch "powerpc: Make value-returning atomics fully ordered" for PPC_ATOMIC_ENTRY_BARRIER definition. Signed-off-by:
Boqun Feng <boqun.feng@gmail.com> Reviewed-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by:
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Boqun Feng authored
commit 49e9cf3f upstream. According to memory-barriers.txt: > Any atomic operation that modifies some state in memory and returns > information about the state (old or new) implies an SMP-conditional > general memory barrier (smp_mb()) on each side of the actual > operation ... Which mean these operations should be fully ordered. However on PPC, PPC_ATOMIC_ENTRY_BARRIER is the barrier before the actual operation, which is currently "lwsync" if SMP=y. The leading "lwsync" can not guarantee fully ordered atomics, according to Paul Mckenney: https://lkml.org/lkml/2015/10/14/970 To fix this, we define PPC_ATOMIC_ENTRY_BARRIER as "sync" to guarantee the fully-ordered semantics. This also makes futex atomics fully ordered, which can avoid possible memory ordering problems if userspace code relies on futex system call for fully ordered semantics. Fixes: b97021f8 ("powerpc: Fix atomic_xxx_return barrier semantics") Signed-off-by:
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Michael Neuling authored
commit 7f821fc9 upstream. Currently we can hit a scenario where we'll tm_reclaim() twice. This results in a TM bad thing exception because the second reclaim occurs when not in suspend mode. The scenario in which this can happen is the following. We attempt to deliver a signal to userspace. To do this we need obtain the stack pointer to write the signal context. To get this stack pointer we must tm_reclaim() in case we need to use the checkpointed stack pointer (see get_tm_stackpointer()). Normally we'd then return directly to userspace to deliver the signal without going through __switch_to(). Unfortunatley, if at this point we get an error (such as a bad userspace stack pointer), we need to exit the process. The exit will result in a __switch_to(). __switch_to() will attempt to save the process state which results in another tm_reclaim(). This tm_reclaim() now causes a TM Bad Thing exception as this state has already been saved and the processor is no longer in TM suspend mode. Whee! This patch checks the state of the MSR to ensure we are TM suspended before we attempt the tm_reclaim(). If we've already saved the state away, we should no longer be in TM suspend mode. This has the additional advantage of checking for a potential TM Bad Thing exception. Found using syscall fuzzer. Fixes: fb09692e ("powerpc: Add reclaim and recheckpoint functions for context switching transactional memory processes") Signed-off-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
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Sven Eckelmann authored
[ Upstream commit 42eff6a6 ] It is not allowed to free the memory of an object which is part of a list which is protected by rcu-read-side-critical sections without making sure that no other context is accessing the object anymore. This usually happens by removing the references to this object and then waiting until the rcu grace period is over and no one (allowedly) accesses it anymore. But the _now functions ignore this completely. They free the object directly even when a different context still tries to access it. This has to be avoided and thus these functions must be removed and all functions have to use batadv_orig_node_free_ref. Fixes: 72822225 ("batman-adv: Fix rcu_barrier() miss due to double call_rcu() in TT code") Signed-off-by:
Sven Eckelmann <sven@narfation.org> Signed-off-by:
Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by:
Antonio Quartulli <a@unstable.cc> Signed-off-by:
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Sven Eckelmann authored
[ Upstream commit b4d922cf ] It is not allowed to free the memory of an object which is part of a list which is protected by rcu-read-side-critical sections without making sure that no other context is accessing the object anymore. This usually happens by removing the references to this object and then waiting until the rcu grace period is over and no one (allowedly) accesses it anymore. But the _now functions ignore this completely. They free the object directly even when a different context still tries to access it. This has to be avoided and thus these functions must be removed and all functions have to use batadv_hardif_free_ref. Fixes: 89652331 ("batman-adv: split tq information in neigh_node struct") Signed-off-by:
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Sven Eckelmann authored
[ Upstream commit ae3e1e36 ] It is not allowed to free the memory of an object which is part of a list which is protected by rcu-read-side-critical sections without making sure that no other context is accessing the object anymore. This usually happens by removing the references to this object and then waiting until the rcu grace period is over and no one (allowedly) accesses it anymore. But the _now functions ignore this completely. They free the object directly even when a different context still tries to access it. This has to be avoided and thus these functions must be removed and all functions have to use batadv_neigh_ifinfo_free_ref. Fixes: 89652331 ("batman-adv: split tq information in neigh_node struct") Signed-off-by:
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Sven Eckelmann authored
[ Upstream commit 2baa753c ] It is not allowed to free the memory of an object which is part of a list which is protected by rcu-read-side-critical sections without making sure that no other context is accessing the object anymore. This usually happens by removing the references to this object and then waiting until the rcu grace period is over and no one (allowedly) accesses it anymore. But the _now functions ignore this completely. They free the object directly even when a different context still tries to access it. This has to be avoided and thus these functions must be removed and all functions have to use batadv_neigh_node_free_ref. Fixes: 89652331 ("batman-adv: split tq information in neigh_node struct") Signed-off-by:
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Sven Eckelmann authored
[ Upstream commit deed9660 ] It is not allowed to free the memory of an object which is part of a list which is protected by rcu-read-side-critical sections without making sure that no other context is accessing the object anymore. This usually happens by removing the references to this object and then waiting until the rcu grace period is over and no one (allowedly) accesses it anymore. But the _now functions ignore this completely. They free the object directly even when a different context still tries to access it. This has to be avoided and thus these functions must be removed and all functions have to use batadv_orig_ifinfo_free_ref. Fixes: 7351a482 ("batman-adv: split out router from orig_node") Signed-off-by:
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Sven Eckelmann authored
[ Upstream commit 44e8e7e9 ] The batadv_nc_node_free_ref function uses call_rcu to delay the free of the batadv_nc_node object until no (already started) rcu_read_lock is enabled anymore. This makes sure that no context is still trying to access the object which should be removed. But batadv_nc_node also contains a reference to orig_node which must be removed. The reference drop of orig_node was done in the call_rcu function batadv_nc_node_free_rcu but should actually be done in the batadv_nc_node_release function to avoid nested call_rcus. This is important because rcu_barrier (e.g. batadv_softif_free or batadv_exit) will not detect the inner call_rcu as relevant for its execution. Otherwise this barrier will most likely be inserted in the queue before the callback of the first call_rcu was executed. The caller of rcu_barrier will therefore continue to run before the inner call_rcu callback finished. Fixes: d56b1705 ("batman-adv: network coding - detect coding nodes and remove these after timeout") Signed-off-by:
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Sven Eckelmann authored
[ Upstream commit 63b39927 ] The batadv_claim_free_ref function uses call_rcu to delay the free of the batadv_bla_claim object until no (already started) rcu_read_lock is enabled anymore. This makes sure that no context is still trying to access the object which should be removed. But batadv_bla_claim also contains a reference to backbone_gw which must be removed. The reference drop of backbone_gw was done in the call_rcu function batadv_claim_free_rcu but should actually be done in the batadv_claim_release function to avoid nested call_rcus. This is important because rcu_barrier (e.g. batadv_softif_free or batadv_exit) will not detect the inner call_rcu as relevant for its execution. Otherwise this barrier will most likely be inserted in the queue before the callback of the first call_rcu was executed. The caller of rcu_barrier will therefore continue to run before the inner call_rcu callback finished. Fixes: 23721387 ("batman-adv: add basic bridge loop avoidance code") Signed-off-by:
Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by:
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Ido Schimmel authored
[ Upstream commit 60a6531b ] We can't be within an RCU read-side critical section when deleting VLANs, as underlying drivers might sleep during the hardware operation. Therefore, replace the RCU critical section with a mutex. This is consistent with team_vlan_rx_add_vid. Fixes: 3d249d4c ("net: introduce ethernet teaming device") Acked-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Doron Tsur authored
[ Upstream commit 0b6e26ce ] With several ConnectX-4 cards installed on a server, one may receive irqn > 255 from the kernel API, which we mistakenly trim to 8bit. This causes EQ creation failure with the following stack trace: [<ffffffff812a11f4>] dump_stack+0x48/0x64 [<ffffffff810ace21>] __setup_irq+0x3a1/0x4f0 [<ffffffff810ad7e0>] request_threaded_irq+0x120/0x180 [<ffffffffa0923660>] ? mlx5_eq_int+0x450/0x450 [mlx5_core] [<ffffffffa0922f64>] mlx5_create_map_eq+0x1e4/0x2b0 [mlx5_core] [<ffffffffa091de01>] alloc_comp_eqs+0xb1/0x180 [mlx5_core] [<ffffffffa091ea99>] mlx5_dev_init+0x5e9/0x6e0 [mlx5_core] [<ffffffffa091ec29>] init_one+0x99/0x1c0 [mlx5_core] [<ffffffff812e2afc>] local_pci_probe+0x4c/0xa0 Fixing it by changing of the irqn type from u8 to unsigned int to support values > 255 Fixes: 61d0e73e ('net/mlx5_core: Use the the real irqn in eq->irqn') Reported-by:
Doron Tsur <doront@mellanox.com> Signed-off-by:
Matan Barak <matanb@mellanox.com> Signed-off-by:
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Nikolay Aleksandrov authored
[ Upstream commit c6894dec ] After promisc mode management was introduced a bridge device could do dev_set_promiscuity from its ndo_change_rx_flags() callback which in turn can be called after the bridge's addr_list_lock has been taken (e.g. by dev_uc_add). This causes a false positive lockdep splat because the port interfaces' addr_list_lock is taken when br_manage_promisc() runs after the bridge's addr list lock was already taken. To remove the false positive introduce a custom bridge addr_list_lock class and set it on bridge init. A simple way to reproduce this is with the following: $ brctl addbr br0 $ ip l add l br0 br0.100 type vlan id 100 $ ip l set br0 up $ ip l set br0.100 up $ echo 1 > /sys/class/net/br0/bridge/vlan_filtering $ brctl addif br0 eth0 Splat: [ 43.684325] ============================================= [ 43.684485] [ INFO: possible recursive locking detected ] [ 43.684636] 4.4.0-rc8+ #54 Not tainted [ 43.684755] --------------------------------------------- [ 43.684906] brctl/1187 is trying to acquire lock: [ 43.685047] (_xmit_ETHER){+.....}, at: [<ffffffff8150169e>] dev_set_rx_mode+0x1e/0x40 [ 43.685460] but task is already holding lock: [ 43.685618] (_xmit_ETHER){+.....}, at: [<ffffffff815072a7>] dev_uc_add+0x27/0x80 [ 43.686015] other info that might help us debug this: [ 43.686316] Possible unsafe locking scenario: [ 43.686743] CPU0 [ 43.686967] ---- [ 43.687197] lock(_xmit_ETHER); [ 43.687544] lock(_xmit_ETHER); [ 43.687886] *** DEADLOCK *** [ 43.688438] May be due to missing lock nesting notation [ 43.688882] 2 locks held by brctl/1187: [ 43.689134] #0: (rtnl_mutex){+.+.+.}, at: [<ffffffff81510317>] rtnl_lock+0x17/0x20 [ 43.689852] #1: (_xmit_ETHER){+.....}, at: [<ffffffff815072a7>] dev_uc_add+0x27/0x80 [ 43.690575] stack backtrace: [ 43.690970] CPU: 0 PID: 1187 Comm: brctl Not tainted 4.4.0-rc8+ #54 [ 43.691270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.1-20150318_183358- 04/01/2014 [ 43.691770] ffffffff826a25c0 ffff8800369fb8e0 ffffffff81360ceb ffffffff826a25c0 [ 43.692425] ffff8800369fb9b8 ffffffff810d0466 ffff8800369fb968 ffffffff81537139 [ 43.693071] ffff88003a08c880 0000000000000000 00000000ffffffff 0000000002080020 [ 43.693709] Call Trace: [ 43.693931] [<ffffffff81360ceb>] dump_stack+0x4b/0x70 [ 43.694199] [<ffffffff810d0466>] __lock_acquire+0x1e46/0x1e90 [ 43.694483] [<ffffffff81537139>] ? netlink_broadcast_filtered+0x139/0x3e0 [ 43.694789] [<ffffffff8153b5da>] ? nlmsg_notify+0x5a/0xc0 [ 43.695064] [<ffffffff810d10f5>] lock_acquire+0xe5/0x1f0 [ 43.695340] [<ffffffff8150169e>] ? dev_set_rx_mode+0x1e/0x40 [ 43.695623] [<ffffffff815edea5>] _raw_spin_lock_bh+0x45/0x80 [ 43.695901] [<ffffffff8150169e>] ? dev_set_rx_mode+0x1e/0x40 [ 43.696180] [<ffffffff8150169e>] dev_set_rx_mode+0x1e/0x40 [ 43.696460] [<ffffffff8150189c>] dev_set_promiscuity+0x3c/0x50 [ 43.696750] [<ffffffffa0586845>] br_port_set_promisc+0x25/0x50 [bridge] [ 43.697052] [<ffffffffa05869aa>] br_manage_promisc+0x8a/0xe0 [bridge] [ 43.697348] [<ffffffffa05826ee>] br_dev_change_rx_flags+0x1e/0x20 [bridge] [ 43.697655] [<ffffffff81501532>] __dev_set_promiscuity+0x132/0x1f0 [ 43.697943] [<ffffffff81501672>] __dev_set_rx_mode+0x82/0x90 [ 43.698223] [<ffffffff815072de>] dev_uc_add+0x5e/0x80 [ 43.698498] [<ffffffffa05b3c62>] vlan_device_event+0x542/0x650 [8021q] [ 43.698798] [<ffffffff8109886d>] notifier_call_chain+0x5d/0x80 [ 43.699083] [<ffffffff810988b6>] raw_notifier_call_chain+0x16/0x20 [ 43.699374] [<ffffffff814f456e>] call_netdevice_notifiers_info+0x6e/0x80 [ 43.699678] [<ffffffff814f4596>] call_netdevice_notifiers+0x16/0x20 [ 43.699973] [<ffffffffa05872be>] br_add_if+0x47e/0x4c0 [bridge] [ 43.700259] [<ffffffffa058801e>] add_del_if+0x6e/0x80 [bridge] [ 43.700548] [<ffffffffa0588b5f>] br_dev_ioctl+0xaf/0xc0 [bridge] [ 43.700836] [<ffffffff8151a7ac>] dev_ifsioc+0x30c/0x3c0 [ 43.701106] [<ffffffff8151aac9>] dev_ioctl+0xf9/0x6f0 [ 43.701379] [<ffffffff81254345>] ? mntput_no_expire+0x5/0x450 [ 43.701665] [<ffffffff812543ee>] ? mntput_no_expire+0xae/0x450 [ 43.701947] [<ffffffff814d7b02>] sock_do_ioctl+0x42/0x50 [ 43.702219] [<ffffffff814d8175>] sock_ioctl+0x1e5/0x290 [ 43.702500] [<ffffffff81242d0b>] do_vfs_ioctl+0x2cb/0x5c0 [ 43.702771] [<ffffffff81243079>] SyS_ioctl+0x79/0x90 [ 43.703033] [<ffffffff815eebb6>] entry_SYSCALL_64_fastpath+0x16/0x7a CC: Vlad Yasevich <vyasevic@redhat.com> CC: Stephen Hemminger <stephen@networkplumber.org> CC: Bridge list <bridge@lists.linux-foundation.org> CC: Andy Gospodarek <gospo@cumulusnetworks.com> CC: Roopa Prabhu <roopa@cumulusnetworks.com> Fixes: 2796d0c6 ("bridge: Automatically manage port promiscuous mode.") Reported-by:
Andy Gospodarek <gospo@cumulusnetworks.com> Signed-off-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 34ae6a1a ] When a tunnel decapsulates the outer header, it has to comply with RFC 6080 and eventually propagate CE mark into inner header. It turns out IP6_ECN_set_ce() does not correctly update skb->csum for CHECKSUM_COMPLETE packets, triggering infamous "hw csum failure" messages and stack traces. Signed-off-by:
Eric Dumazet <edumazet@google.com> Acked-by:
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Rabin Vincent authored
[ Upstream commit 229394e8 ] On ARM64, a BUG() is triggered in the eBPF JIT if a filter with a constant shift that can't be encoded in the immediate field of the UBFM/SBFM instructions is passed to the JIT. Since these shifts amounts, which are negative or >= regsize, are invalid, reject them in the eBPF verifier and the classic BPF filter checker, for all architectures. Signed-off-by:
Rabin Vincent <rabin@rab.in> Acked-by:
Alexei Starovoitov <ast@kernel.org> Acked-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 7aaed57c ] Ivaylo Dimitrov reported a regression caused by commit 7866a621 ("dev: add per net_device packet type chains"). skb->dev becomes NULL and we crash in __netif_receive_skb_core(). Before above commit, different kind of bugs or corruptions could happen without major crash. But the root cause is that phonet_rcv() can queue skb without checking if skb is shared or not. Many thanks to Ivaylo Dimitrov for his help, diagnosis and tests. Reported-by:
Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Tested-by:
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Lars Persson authored
[ Upstream commit d4618732 ] The offset inside the fragment was not used for the dma address and silent data corruption resulted because TSO makes the checksum match. Fixes: 077742da ("dwc_eth_qos: Add support for Synopsys DWC Ethernet QoS") Signed-off-by:
Lars Persson <larper@axis.com> Signed-off-by:
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Karl Heiss authored
[ Upstream commit 03d84a5f ] Commit 1f718f0f ("bonding: populate neighbour's private on enslave") undoes the fix provided by commit c2edacf8 ("bonding / ipv6: no addrconf for slaves separately from master") by effectively setting the slave flag after the slave has been opened. If the slave comes up quickly enough, it will go through the IPv6 addrconf before the slave flag has been set and will get a link local IPv6 address. In order to ensure that addrconf knows to ignore the slave devices on state change, set IFF_SLAVE before dev_open() during bonding enslavement. Fixes: 1f718f0f ("bonding: populate neighbour's private on enslave") Signed-off-by:
Karl Heiss <kheiss@gmail.com> Signed-off-by:
Jay Vosburgh <jay.vosburgh@canonical.com> Reviewed-by:
Jarod Wilson <jarod@redhat.com> Signed-off-by:
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Konstantin Khlebnikov authored
[ Upstream commit 9207f9d4 ] Skb_gso_segment() uses skb control block during segmentation. This patch adds 32-bytes room for previous control block which will be copied into all resulting segments. This patch fixes kernel crash during fragmenting forwarded packets. Fragmentation requires valid IP CB in skb for clearing ip options. Also patch removes custom save/restore in ovs code, now it's redundant. Signed-off-by:
Konstantin Khlebnikov <koct9i@gmail.com> Link: http://lkml.kernel.org/r/CALYGNiP-0MZ-FExV2HutTvE9U-QQtkKSoE--KN=JQE5STYsjAA@mail.gmail.comSigned-off-by:
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Michal Kubeček authored
[ Upstream commit 40ba3302 ] Commit acf8dd0a ("udp: only allow UFO for packets from SOCK_DGRAM sockets") disallows UFO for packets sent from raw sockets. We need to do the same also for SOCK_DGRAM sockets with SO_NO_CHECK options, even if for a bit different reason: while such socket would override the CHECKSUM_PARTIAL set by ip_ufo_append_data(), gso_size is still set and bad offloading flags warning is triggered in __skb_gso_segment(). In the IPv6 case, SO_NO_CHECK option is ignored but we need to disallow UFO for packets sent by sockets with UDP_NO_CHECK6_TX option. Signed-off-by:
Michal Kubecek <mkubecek@suse.cz> Tested-by:
Shannon Nelson <shannon.nelson@intel.com> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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John Fastabend authored
[ Upstream commit 3de03596 ] Fix possible null pointer dereference that may occur when calling skb_reserve() on a null skb. Fixes: 879c7220 ("net: pktgen: Observe needed_headroom of the device") Signed-off-by:
John Fastabend <john.r.fastabend@intel.com> Signed-off-by:
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Jamal Hadi Salim authored
[ Upstream commit 66530bdf ] only when user space passes the addresses should we consider their presence Signed-off-by:
Jamal Hadi Salim <jhs@mojatatu.com> Acked-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
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